LifeStraw Peak Series Collapsible Squeeze Bottle Filter Review

The Peak Series filter threads onto standard 28mm bottle necks, which means the same cartridge covers a supplied soft flask, a disposable bottle, an inline bladder setup, or direct sipping as a straw. That flexibility is the strongest reason to choose it, because it lets one purchase cover several ways of drinking without committing to any of them.

The 0.2-micron hollow-fibre membrane covers bacteria, protozoa and microplastics, which is the same practical protection as the Sawyer range despite the slightly larger pore size. Backflushing is done by squeezing clean water back through the cartridge rather than with a separate syringe, and owner reports describe flow recovering well when that is done regularly.

Where it loses ground is the numbers on either side of it. The 2,000-litre rated life is well short of Sawyer's, so it is a consumable rather than a buy-once item. Flow is respectable but does not approach the BeFree, and the soft bottle draws more durability complaints than the filter itself.

The straw mode is more useful on a bike than it first appears. Being able to drink directly from a stream without unpacking a bottle turns a water stop into a thirty-second pause, which on a hot day is the difference between drinking enough and rationing. It also gives a fallback if the soft bottle fails.